Ckossctjt-sawietg machine



UNITED sTATEs PATENT oEEIcE.

FREDERICK FIELD, OF TOLEDO, OHIO.

CROSSCUT-SAWING- MACHINE.

Specication of Letters Patent No.l 13,351, dated July 31, 1855.

To all whom it may concern.

Be it known that I, FREDERICK FIELD, of

Toledo, in the county of Lucas and State of' Ohio, have invented certainnew and use-ful Improvements in Machines for Sawing Logs into Blocks forStave-Timber, Shingle- Bolts, Wagon-Hubs, F ire-Wood, &c.; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is atop view. Fig. 2 is a vertical section in the line 1 2 of Fig. l.

The letters of reference, indicate the same parts in the differentfigures wherever they occur.

I construct a bed frame a which may rest upon the ground, or be placedupon wheels, this fra-me affords bearings for the gudgeons (c) of thewalking frame which sustains at one end the shafts of two circular sawsd and e running in the same vertical plane, and provided with suitablebalance wheels; the shaft of CZ being hung upon adjustable arms, f,capable of adjustment by means of a bolt in the slot z' to compensatefor the wear of the saws. Upon the opposite end of the frame b isattached a counterbalance weight (g) aided by the spring it if required.

The driving wheel h is keyed to a shaft j having its bearings intheframe a and carries a fixed pulley 7c connected by a band with thepulley Z, which has its bearings in the frame, b, concentric with thegudgeons c,

which position enables it to transmit motion by means of bands to thesaw Z and through the medium of the pulley fm, to the saw, e,A

without altering the tension of the bands in any position of the walkingframe b.

Attached to the bed frame a, and at right angles therewith, is a frameor logway n, in which are journals of the notched feed rollers, o, uponwhich the log is placed. Parallel to the frame, n, and journaled uponprolongations of the cross pieces thereof, is a feed shaft (p) furnishedwith bevel gearing, which takes into corresponding bevel wheels upon thejournals of several of the feed rollers, 0,' this shaft has also a loosepulley, and clutch (g), and receives its motion (when in gear) from thepulley r by means of a band, which pulley is fixed upon the main feedshaft s. A sliding bar (t) furnished with a spiral spring, and an arm Y(u) serves to keep the pulley g in gear when relieved from any pressureagainst its upward bent portion fv, by the long levels fw (which has anadjustable fulcrum in the upright x). A cylinder pulley (y) furnishedwith suitable projections taking into a clutch, runs upon the main feedshaft s, and being in gear, and the machinery set in motion from itsposition in Fig. 2, draws down the end of the walking frame, Z) (towhich the saws are attached) by means of a cord or chain attachedthereto and wound upon y, causing the saws to cut oif a block from thelog previously placed upon the ways, and touching the gage or set screw,in the lever L. When the saws have descended below the level of the logway and have cutoff a block., an arm (a) projecting downward' from theframe Z), and beveled off at its lower extremity comes in contact withone side of a lever c pivoted at b', and connected at the other end withthe fork that moves the clutch e', and serving as a pivot to connect itwith t-he bent lever z", throwing the pulley g/ out of gear, andallowing the counter* poise g to elevate the saws to their formerposition; as the end of the frame rises the long lever 'w being caughtin a notch in the spring bar j depending from the frame Z) is carriedup, and being removed from the upright bar e, allows the spring clutch gto throw the feed rollers into gear; the log then advances until itbears againstthe set screw on the lever L; this lever having its fulcrumat o acts upon a short lever Z which throws the spring bar y" back,disengaging the lever w from its notch; the lever 'w falls by its owngravity aided by the spring/a and striking upon the bent portion of thelever z" throws the cylinder pulley 'j intov gear, and at the same timethrows the feed shaft p out of gear by striking the bar lv, and thenrests upon the log to steady it while being sawed. The operations abovedescribed are then repeated, the machine requiring only an attendant tosupply fresh logs, and to remove the blocks when sawed.

What I claim as my invention is- The arrangement of the two circularsaws hung in a vibrating frame operating and operated substantially inthe manner set forth in combination, with the mode substantially asdescribed of throwing the feed motion in and out of gear.

FREDERICK FIELD.

Witnesses:

L. CAMPBELL, JOHN C. SMITH.

